Ceiling-board hanger for arc-lamps.



PATENTED AUG. 4, 1903.

H. C. WIRT.

CEILING BOARD HANGER EUR ARG LAMPS.

APPLIUATION FILED .TUNE 19, 1901.

N0 MODEL.

Inventor'.

Wicnssses:

UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

HERBERT C. VIRT, OF SCI-IENEC'IADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

SPECIFICATION forming* part 0f Letters Patent NO. 735,189, dated August 4, 1903.

Application iiled June 19, 1901. Serial No. 65,110. (No model.)

To @ZZ whom t may concern:

Be it known that I, HERBERT O. VIRT, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Ceiling-Board Hangers for Arc-Lamps, of which the following is a speciiication.

This invention relates to electric lighting; and its object is to provide improved means for suspending arc-lamps from ceilings or other overhead supports.

The invention consists in a ceiling-board, so called, provided with a spring-supported suspension-hook for the lamp, a removable plug-fuse in each side of the circuit, and connections for the lamp and for a lamp-controlling switch. Y

In the accompanying drawings, Figure l is a bottom plan view, partly broken away, of my improved ceiling-board. Fig. 2 is a diametrical section of the same on the line 2 2, Fig. 1. Fig. 3 is a diagram of connections.

A receptacle A, of porcelain or other insulation, is interposed between the ceiling or other support and the hanger-base B, which is made of insulation, preferably porcelain, and secured to the receptacle A by screws passing through holes o. The receptaele'has a hole a, through which the line-wires are led, and is dished on its under side to form a chamber a', in which the wires can be run to the binding-screws on the base B.

The lamp-suspension hook C is located at the center of the hanger. It is provided with a yielding or resilient connection with the hanger-base in order to avoid the troubles arising from the vibration and jar in shops and other large buildings. This yielding connection is preferably a helical spring C', encircling the shank c of the hook and received in a socket or chamber b countersunk in the base B around the upper end of the shank. A nut c/ on the shank rests on the upper end of the spring and transfers to it the weight of the lamp. To maintain the lamp in a given position and prevent it from turning, the shank c is made polygonal in cross-section to fit a polygonal hole in the hanger-base.

At suitable points one or more recesses b2 are formed in the under side of the base B. In each recess is secured a metallic socket D, preferably a screw-threaded shell, like an Edison incandescent-lamp socket.` The shell is secured by a central screw E, which passes through a disk F, of insulation, and through a hole in the base B into a strip G of metal, which passes down through an adjoining hole b3 in the base and carries on its lower projecting end a binding-screwg. A similar strip H has one end clamped between the shell and the base out of contact with the screw E and extends down alongside the shell to and below the lower face of the base B, where it carries a binding-screw h. The strips G H are preferably on opposite sides of the socket. A plug I, carrying a fuse having external and central terminals, is screwed into each socket, the terminals of the fuse makiugcontact with the shell D and screw E, and so with the strips G H. The construction of the fuse-plug need not be shown or described in detail, being similar to the one set forth, for instance, in United States Patent No. 264,299 to E. H. Johnson, September 12, 1882. The line-terminals are preferably brought down through holes b4 in the base and connected with the strips H by the bindingscrews h. The lamp-terminals may be connected with the strips G by the bindingscrews g, or, if it is desired to insert a lampcontrolling switch in the circuit, a metallic plate K is fastened to the base B, carrying binding-screws 7c 7c, and the switch L is connected in between one pair of binding-screws g Zt, while thelamp is connected in between the other pair. In either case each side of the circuit is provided with a removable plug- A fuse, so that the lamp is amply protected, Y

and in case either fuse burns out it can be Vquickly and safely replaced.

IOO

'mles' 5; A ceiling-board hanger for arc-lamps, consisting of the combination with an insulating-base B having recesses b2 and holes b3, of screw-threaded' shells D and screws E in said recesses, strips G passing through the holes b3 and connected with the screws E, stripsH connected with the shells D, aplate K, and binding-screws g, h, k.

In Witness whereof I have hereunto set my hand this 17th day of June, 1901.

HERBERT C. WIRT.

Witnesses:

BENJAMIN B. HULL, EDWARD WILLIAMS, J r. 

